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THE NATURE OF THE SOFT EXCESS IN THE RADIO AND GAMMA-RAY LOUD NLS1 PKS 2004-447

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ESA Earth Online2026-06-22 收录
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Xray emission in excess of the intrinsic power law below 2 keV is a typicalfeature of radioquiet active galactic nuclei (AGN). It has now been observed ina few sources of the newlydiscovered class of radioloud and gammaray emittingnarrowline Seyfert 1 (gammaNLS1) galaxies. But the nature of this component inradioloud AGN is not clear. Very recently, we found tentative evidence for thepresence of a variable soft excess in the gammaNLS1 galaxy PKS 2004447(Kreikenbohm et al. 2015, A&A, in press). Here, we propose atargetofopportunity observation to study this peculiar component in this keysource for the class of gammaNLS1 galaxies. The unique joint NuSTARXMMNewtonprogram allows for the first reliable detection of the soft excess in this source. truncated!, Please see actual data for full text [truncated!, Please see actual data for full text]

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European Space Agency
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